Company Filing History:

13 out of 27,375

Matsushita Electric Industrial Co., Ltd.

Years Active: 1976-2004

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15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6757192 - Magnetic recording element, magnetic memory, magnetic recording method, method for fabricating a magnetic recording element, and method for fabricating a magnetic memory (2004-06-29),

2. 6750450 - Scanning magnetism detector and probe (2004-06-15),

3. 6562486 - Exchange coupling film, magnetoresistance effect device, magnetoresistance effective head and method for producing exchange coupling film (2003-05-13),

4. 6258470 - Exchange coupling film, magnetoresistance effect device, magnetoresistance effective head and method for producing exchange coupling film (2001-07-10),

5. 5358576 - Amorphous materials with improved properties (1994-10-25),

6. 4535376 - Magnetic head incorporating an amorphous magnetic metallic film having a (1985-08-13),

7. 4488195 - Magnetic head and method of producing same (1984-12-11),

8. 4437912 - Amorphous magnetic alloys (1984-03-20),

9. 4312683 - Method for heat-treating amorphous alloy films (1982-01-26),

10. 4288307 - Method of making a magnetic head (1981-09-08),

11. 4288260 - Method of heat treatments of amorphous alloy ribbons (1981-09-08),

12. 4064224 - Method of making fibrous alkali titanates (1977-12-20),

13. 3956151 - Method for producing a ferromagnetic chromium oxide (1976-05-11),

14. 3954641 - Process for the preparation of sulfur modified ferromagnetic chromium (1976-05-04),

15. 3931642 - Magnetic head and method of making the same (1976-01-06),

Title: Eiichi Hirota: Innovator in Magnetic Recording Technologies

Introduction

Eiichi Hirota is a prominent inventor based in Hirakata, Japan. He has made significant contributions to the field of magnetic recording technologies, holding a total of 15 patents. His work has advanced the understanding and application of magnetic materials in various electronic devices.

Latest Patents

Hirota's latest patents include innovative technologies such as a magnetic recording element, magnetic memory, and methods for fabricating these components. The magnetic recording element he developed consists of a first magnetic film that generates a spin vortex when exposed to an external magnetic field. This is complemented by a second magnetic film with perpendicular magnetization and an insulating layer that regulates current flow. By applying an external magnetic field, a spin vortex is created, allowing data to be written on the vertical magnetization at the center of the vortex. Additionally, he has designed a scanning magnetism detector featuring a probe made from a single crystal material that exhibits spin polarization and electrical conductivity. This probe can detect the surface conditions of magnetic substances by measuring tunnel current flow.

Career Highlights

Throughout his career, Hirota has worked with notable organizations, including Matsushita Electric Industrial Co., Ltd. and Hokkaido University. His experience in these institutions has allowed him to collaborate with other experts in the field and further his research in magnetic technologies.

Collaborations

Some of Hirota's notable coworkers include Hiroshi Sakakima and Harufumi Senno. Their collaborative efforts have contributed to the advancements in magnetic recording technologies.

Conclusion

Eiichi Hirota's innovative work in magnetic recording technologies has established him as a key figure in the field. His patents and collaborations continue to influence advancements in electronic devices and materials.

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